COMMON LANGUAGE LOCATION IDENTIFICATION (CLLI) CODE ...

1.04 This Section has been structured to permit
extraction of Part 10, CLLI Exhibits, for use
as an encoding aid.
1.05 Common Language Location Identification
codes are in widespread use throughout the
Bell System and are maintained in an on-line master
data base by the Bell Laboratories Common Lan­
guage Department at Piscataway, New Jersey. Each
Operating Company's CLLI coordinator is responsible
for maintaining that Company's CLLI database,
using procedures defined in this section and in the
CLLI On-line System User's Manual. Descriptive information
associated with the CLLI code, may be
found in the CLLI On-Line System.
1.06 Common Language Location Identification
codes identify originating and terminating
locations for Common Language Facility Identification
(CLFI) and for Common Language Circuit Identification-Message
Trunks (CLCI-MSG). Refer to
Section 795-450-100 and Section 795-400-100, respectively,
for descriptions of these uses of CLLI. The
CLLI codes have been deployed extensively in cen­
trally developed systems, eg, TIRKS, FACS, etc. For
these reasons, indiscriminate and/ or unnecessary
CLLI code changes should be avoided.
1.07 It is important to remember that CLLI codes
should be without specific user orientation, ie,
codes should not be oriented toward a particular de­
partment or user and should be within the guidelines
of this section.
1.08 All Operating Company personnel having re­
sponsibility for assigning and maintaining
CLLI codes must know what codes are stored in their
portion of the CLLI master file.
It is not the intent of the CLLI codes to identify all
information pertaining to the location or to identify
each piece of equipment or each work group at a particular
location. For most of the detail, the user must
look beyond CLLI to other code sets or data bases.
1.09 Questions concerning codes contained in this
section, and requests for new codes should be
directed, via the Operating Company Common Language
Coordinator, to the Common Language De­
partment at Bell Laboratories. Development of new
codes and changes in coding procedures require approval
of AT&T Company.
ISS 5, SECTION 795-1 00-1 00
2. CODE DESCRIPTION AND STRUCTURE
A. Code Description
2.01 The Common Language Location Identifica-
tion code is a geographic identifier which
uniquely identifies the geographic location of places
and certain "things" of interest to the Bell System
and Operating Telephone Companies in the United
States, Canada, and other countries. Collectively,
these are known as "CLLI" or "location" codes, and
are used in various manual and mechanized systems.
2.02 The CLLI codes identify existing and pro-
posed buildings which contain or will con­
tain personnel and/or equipment, eg, switching
machines, boards/ desks, radio and carrier equipment,
plant service centers, testrooms, frames, maintenance
groups, etc. They identify nonbuilding
locations of entities, such as repeaters, poles, manholes,
facility junctions, etc. In addition, CLLI codes
identify certain customer locations.
B. Code Structure
2.03 The CLLI code is an 11-character mnemonic
alphanumeric code consisting of the following
elements:
(a) Place (character positions 1 through 4).
(b) State of the United States, Province or Territory
of Canada, or Country (character positions
5 and 6). These are known collectively as
"State" codes.
(c) Building (character positions 7 and 8).
(d) Entity (character positions 9 through 11),
formerly called Building Subdivision. All
Traffic, Plant, and Administrative Units have
been regrouped into two categories: Switching
Entities and Nonswitching Entities.
(e) Nonbuilding location or customer loca­
tion (character positions 7 through 11).
2.04 These elements may be combined into the fol­
lowing basic Common Language Location
Identification formats:
(a) Place, state, building, and entity (11 characters)
(b) Place, state, and nonbuilding location (11
characters)
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